I cant figure out this movie..I believe its in the 80's not to sure but bare with me...Some young kid is in his bedroom at night with this pj's his window flies open..His bed flies out from the window and takes him to a mythical land..All of a sudden The kid is in a hot air balloon with thousands of hot air balloons flying down with him.. He meets the king of this city that looks like a huge santa clause look a like. The santa clause guy comes out riding a mini train and greets him and tells him you can go any where but don't open a certain door that unlocks a evil monster that looks like a huge black sludge, that takes over everything..eventually the kid opens the door and the monster is released..I believe the kid kills the thing with a very bright item not sure tho... The kid walks around with a talking cat that wears a suit and a hat.. PLEASE HELP ITS BEEN KILLIN ME..Thanks